Notify GCMAppHandlers when the store is reset, so they clear cached IDs

components/proximity_auth/cryptauth/cryptauth_gcm_manager_impl.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_PROXIMITY_AUTH_CRYPTAUTH_CRYPTAUTH_GCM_MANAGER_IMPL_H
 #define COMPONENTS_PROXIMITY_AUTH_CRYPTAUTH_CRYPTAUTH_GCM_MANAGER_IMPL_H
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
@@ skipping 28 matching lines @@
   // CryptAuthGCMManager:
   void StartListening() override;
   void RegisterWithGCM() override;
   std::string GetRegistrationId() override;
   void AddObserver(Observer* observer) override;
   void RemoveObserver(Observer* observer) override;
 
  private:
   // GCMAppHandler:
   void ShutdownHandler() override;
+  void OnStoreReset() override;
   void OnMessage(const std::string& app_id,
                  const gcm::IncomingMessage& message) override;
   void OnMessagesDeleted(const std::string& app_id) override;
   void OnSendError(const std::string& app_id,
                    const gcm::GCMClient::SendErrorDetails& details) override;
   void OnSendAcknowledged(const std::string& app_id,
                           const std::string& message_id) override;
 
   // Called when GCM registration completes.
   void OnRegistrationCompleted(const std::string& registration_id,
@@ skipping 12 matching lines @@
   base::ObserverList<Observer> observers_;
 
   base::WeakPtrFactory<CryptAuthGCMManagerImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CryptAuthGCMManagerImpl);
 };
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_CRYPTAUTH_CRYPTAUTH_GCM_MANAGER_IMPL_H